#include <string>
#include <iostream>
using namespace std;
int main(){
	string str="Maybe you will turn around.";
	string str2="will not";
	string str3="surely";
	cout << str.replace(10,4,str2) << endl;
	cout << str.replace(str.begin(),str.begin()+5,str3) << endl;
	return 0;
}

